#include <bits/stdc++.h>
using namespace std;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int test; cin >> test;
    while(test--){
        long long N,X; cin >> N >> X;
        long long minx = (N+1)*N/2;
        if(minx > X){cout << -1 << endl; continue;}

        long long more = X-minx,add = more/N;
        more %= N;
        for(int i=0; i<N; i++){
            if(i) cout << " ";
            if(i < more) cout << N-i+add+1;
            else cout << N-i+add;
        }
        cout << endl;
    }
}